What is CVE-2017-7863?

CVE-2017-7863 is a critical-severity vulnerability in Ffmpeg, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2017-04-14.

How severe is CVE-2017-7863?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Ffmpeg

CVE-2017-7863

FFmpeg before 2017-02-04 has an out-of-bounds write caused by a heap-based buffer overflow related to the decode_frame_common function in libavcodec/pngdec.c.

Vulnerability class: Buffer Overflow

Published 2017-04-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.026 (84.5th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 85th percentile — 84.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.026 · newest: 0.026 · change: 0.000

Affected products

Ffmpeg
Debian Linux — versions 8.0

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

bugs.chromium.org/p/oss-fuzz/issues/detail (VDB Entry, Third Party Advisory)
www.securityfocus.com/bid/97675 (VDB Entry, Third Party Advisory, vdb-entry)
github.com/FFmpeg/FFmpeg/commit/e477f09d0b3619f3d29173b2cd593e17e2d1978e (Patch, Third Party Advisory)
lists.debian.org/debian-lts-announce/2019/02/msg00005.html (mailing-list, Third Party Advisory)

Frequently asked questions

What is CVE-2017-7863?: CVE-2017-7863 is a critical-severity vulnerability in Ffmpeg, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2017-04-14.
How severe is CVE-2017-7863?: Critical severity. CVSS v3 base score is 9.8 out of 10.